helpmexoxo
A firecracker shoots up from a hill 150 feet high with an initial speed of 95 feet per second. Using the formula H(t) = −16t2 + vt + s, determine how long it will take the firecracker to hit the ground.
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NotTim
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1. Let's draw a diagram.
2. LEt's make a variables list
3 Find der formulas tu need!
NotTim
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4. Solve it! remember which formulas need to be 'combined'!
Romero
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Do you just want the answer?
NotTim
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blue bird! go back to your other question! THIS MA TOWN!
NotTim
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oooh wait. this aint physics...
helpmexoxo
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How would i make a variables list?
NotTim
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you just need to find the end points!
helpmexoxo
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I'm confused :o
helpmexoxo
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I thought you only plug in the numbers to the equation but i'm unsure if that's correct or how to do it even if it is correct
NotTim
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v=95 ft/s
H(t)=150
NotTim
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solve for s!
NotTim
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wait...what's s? solve for t, silly me
helpmexoxo
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ok but there is also a s!?
helpmexoxo
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I tried to solve but i'm soooo confused
lgbasallote
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let H(t) = 0
then solve for t
NotTim
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really? shoot. I suck at even trinomials now huh
NotTim
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maybe s is given elsewhere in your textbook
helpmexoxo
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no it isn't :o
helpmexoxo
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@Romero yes please can i have the answer
NotTim
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@lgbasallote wat is s?
lgbasallote
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i'd like to say it's the distance traveled
helpmexoxo
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Is the answer 7.2 seconds?
NotTim
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dunno. doesnt your txtbook ahve the answer?
helpmexoxo
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no @lgbasallote is the answe 7.2s ?!
helpmexoxo
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i'm doing an online course not from a textbook!
lgbasallote
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lol shouldnt @NotTim be answering this o.O
wait..ill check
NotTim
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i dont wanna do math...
lgbasallote
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it;s what my calculator said
helpmexoxo
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ok thank you all :)